Hitachi VK-S454R Service Manual page 30

Troubleshooting > Trouble Diagnosis
( 9 ) N o I R c o n t ro l o p e r a t i o n
NG
IC1380-10
(TL1301):
7.2V
OK
When power
NG
turned on:TL1381:
Pulse
OK
OK
TL1383 to 1386:
Pulses
NG
NG
IC1380-2,4,24: 3V
OK
NG
IC1380-10,
15: 7.2V
OK
NG
TL1388: Pulse
OK
NG
IC1380-23:
Pulse
OK
NG
IC1380-20:
Pulse
OK
NG
IC1380-5: Pulse
OK
IC1380 faulty
The test lands and components of circuit no. 1000-1099 are
on the SP circuit board.
L1301 faulty.
The test lands and components of circuit no. 1100-1499 are
on the PC circuit board.
The test lands and components of circuit no. 1500 and higher
are on the CSR circuit board.
C h e c k t h e
NG
c o n n e c t i o n s o f t h e
l e n s f l a t c a b l e .
OK
L e n s u n i t f a u l t y .
Lens unit faulty.
Check the 3V line
Check the 7.2V (VM)
line
IC1201 faulty.
IC1201 faulty.
IC1201 faulty.
IC1201 faulty.
C o r r e c t t h e
c o n n e c t i o n s
o f t h e f l a t c a b l e .
4 - 11